262469domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the form 2^k + k^2 + 1.at n=3A035325Primes of the form (x+y)^2+2^x+2^y, with x and y nonnegative.at n=13A162577Primes of form x^y + y^x + 1.at n=19A172146a(n) = A139602(m) such that for any k>m, A139602(k) > A139602(m).at n=26A189888Prime numbersat n=23026